EP0844410A1 - Palier magnétique actif longitudinalement et transversalement - Google Patents

Palier magnétique actif longitudinalement et transversalement Download PDF

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Publication number
EP0844410A1
EP0844410A1 EP97402825A EP97402825A EP0844410A1 EP 0844410 A1 EP0844410 A1 EP 0844410A1 EP 97402825 A EP97402825 A EP 97402825A EP 97402825 A EP97402825 A EP 97402825A EP 0844410 A1 EP0844410 A1 EP 0844410A1
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EP
European Patent Office
Prior art keywords
axis
magnetic
ferromagnetic
magnetic bearing
coils
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97402825A
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German (de)
English (en)
French (fr)
Inventor
Charles Lambert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus Group SAS
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Airbus Group SAS
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Filing date
Publication date
Application filed by Airbus Group SAS filed Critical Airbus Group SAS
Publication of EP0844410A1 publication Critical patent/EP0844410A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0459—Details of the magnetic circuit
    • F16C32/0461—Details of the magnetic circuit of stationary parts of the magnetic circuit
    • F16C32/0465—Details of the magnetic circuit of stationary parts of the magnetic circuit with permanent magnets provided in the magnetic circuit of the electromagnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0459—Details of the magnetic circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0472—Active magnetic bearings for linear movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0474—Active magnetic bearings for rotary movement
    • F16C32/0485—Active magnetic bearings for rotary movement with active support of three degrees of freedom
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned

Definitions

  • the present invention relates generally to a bearing magnetic comprising a magnetic circuit formed by a fixed part and a contactless moving part.
  • a magnetic bearing is used for magnetically active centering, according to a or two centering axes, of a body movable relative to another body.
  • the two bodies have ferromagnetic portions, without contact, forming jointly the bearing, and the movable body is said to be in suspension.
  • a centering magnetically active involves the use of a winding in which a adjustable current capable of generating an adjustable magnetic flux in air gaps varying parallel to the centering axis.
  • Magnetic bearings can be used as well in the case of rotary movements only in the case of linear movements.
  • a bearing magnetic along a reference axis, sometimes called a longitudinal axis, or along a transverse axis, or alternatively along two transverse axes.
  • a bearing further comprises permanent magnets which can contribute to active centering, but also, in certain configurations, ensure passive centering along one or more other axes.
  • a category of magnetic bearings for rotating bodies provides active centering along two transverse, or radial, axes and a passive centering along the axis of rotation, or longitudinal axis; we sometimes talk about Radially active 2-axis bearing ("transverse, or radial bearing").
  • Another category of magnetic bearings for rotating bodies ensures active centering along the longitudinal axis and passive centering along the transverse axes; we sometimes speaks of a 1-axis, axially active bearing (“longitudinal or axial bearing”).
  • bearings must be magnetically decoupled to act independently of each other on the mobile part. For this, they are separated one from the other and are for example juxtaposed along the longitudinal axis of the bearing.
  • stator part of the active bearing along the longitudinal axis of reference must be inserted and positioned between two shrouded pole pieces on the rotor part, while the elements of the bearing active transversely, juxtaposed with the previous one, must also be mounted and positioned one compared to others.
  • the present invention aims to remedy the drawbacks of the technique anterior, providing a magnetic bearing for a rotating body or body in translation, which is active along a reference axis and at least one axis transverse, of a smaller volume, and simpler to manufacture than according to the prior art, but with an equivalent level of performance.
  • the bearing according to the invention is active along the axis of reference and at least one transverse axis.
  • the volume of the bearing magnetic according to the invention is more reduced than in the case where a longitudinal bearing and a transverse bearing juxtaposed.
  • the manufacturing of the magnetic bearing according to the invention is simpler and therefore less more expensive than in the prior art.
  • the invention may appear to have similarities a posteriori to the document FR-A-2.730.021 (AEROSPATIALE) which seeks to ensure tilting function (on a displacement of several degrees, typically from three to five degrees) and a possible centering function according to at least a centering axis perpendicular to a reference axis. It does indeed main air gaps between main pole pieces of a first ferromagnetic part and a second ferromagnetic part and an air gap median between a ferromagnetic part median of the first part ferromagnetic and the second ferromagnetic part.
  • AEROSPATIALE AEROSPATIALE
  • the main air gaps and the median air gap are, unlike the invention, variable parallel to the same axis, namely a axis transverse to a reference axis.
  • this document is concerned with controlling a switchover, in combination with a possible centering, which is quite different from the problem of the invention which relates to two centering axes without tilting.
  • This document had a priori no interest for the skilled person who was looking for to solve the problem of the invention.
  • the first parts Ferromagnetics are intended to be carried by the fixed body. Indeed, the elements of the first ferromagnetic parts are relatively heavy and are preferably fixed.
  • the second ferromagnetic part is arranged between the first ferromagnetic parts, or conversely the second ferromagnetic part is arranged around the first parts ferromagnetic.
  • the structure of the bearing according to the invention is thus adaptable to a large number of configurations.
  • the reference axis is an axis of rotation of the movable body relative to the fixed body
  • the second part ferromagnetic is a magnetic crown
  • the ferromagnetic part median is generally annular in the region of the median air gap.
  • two other magnetic circuits of the same structure are arranged on either side of the axis of rotation along a second transverse centering axis perpendicular to the axis of rotation, with two other first parts ferromagnetic cooperating with the second ferromagnetic part through two other main air gaps of variable thickness parallel to the axis of rotation, coils being adapted to generate a magnetic flux controllable in these two other magnetic circuits, other magnets permanent in opposite directions of magnetization being arranged in these two others first ferromagnetic parts on either side of the room middle ferromagnetic, said middle ferromagnetic part being separated of the second ferromagnetic part by two other median air gaps, and the coils being adapted to generate a controllable magnetic flux in the said two other median air gaps.
  • the bearing then allows the centering of the rotary body relative to the body fixed along the reference axis and along two transverse axes.
  • the second part ferromagnetic is a movable magnetic bar along a perpendicular axis to the reference axis.
  • the invention applies to a magnetic bearing comprising a rotor part 1 and a stator part 2. These parts 1 and 2 are integral with a rotor A and a stator B, respectively.
  • the reference axis of the magnetic bearing is, in this case, the axis of rotation, or longitudinal axis, Z-Z of rotor A which is a cylindrical shaft.
  • the Z-Z axis is vertical, although it can adopt any tilt relative to the vertical.
  • the rotor part 1 is generally a magnetic crown and more precisely a cylinder made of a material ferromagnetic and thus constitutes a pole piece which is advantageously provided with three flanges 11, 12 and 13.
  • the flanges 11 and 13 respectively upper and lower, surround the middle flange 12, which is preferably located in the middle of the space separating the flanges 11 and 13.
  • This collar 12 here has a height along the axis Z-Z which is substantially triple that of the other two flanges 11 and 13. In fact, as we will see, the axial thickness of the flanges 11 and 13 does not matter, since their purpose is to provide axial air gaps.
  • the Z-Z axis constitutes a first longitudinal axis for centering the bearing according to the invention.
  • the bearing has two radial or transverse axes of centering X-X and Y-Y perpendicular to the axis of rotation Z-Z of rotor A.
  • the stator part 2 comprises two ferromagnetic plates parallel, identical 21 and 22, hollowed out in their center 212, 222.
  • the pieces polar 21 and 22 are in the shape of a cross with four branches 210, respectively 220, separated by notches 211, respectively 221.
  • Each notch 211, 221 is centered on an axis substantially 45 degrees from the axes X-X and Y-Y.
  • the plates 21 and 22 are pole pieces, called main pole pieces, perpendicular to the Z-Z axis, and centered on this axis.
  • a middle pole piece 23 of axis Z-Z is arranged, here at mid-distance, between the plates 21 and 22.
  • the pole piece 23 is ferromagnetic and shaped a cross with four branches 230, separated by notches 231. The branches and notches of the pole piece are superimposed on those of pole pieces 21 and 22.
  • the pole piece 23 has a thickness which is substantially equal to twice that of plates 21 and 22 and an outside diameter equal to that of plates 21 and 22.
  • the internal diameter of the middle pole piece is lower than that of the pole pieces 21 and 22.
  • the pole piece 23 is arranged radially opposite the middle flange 12 of the part rotor and here has the same axial thickness.
  • the part of the pole piece 23 in look of the collar 12 is generally annular.
  • notches 231 do not completely separate the branches 230, and that the latter are connected two by two by bridges 232 thin radial, located on the inner periphery of the pole piece 23.
  • Bridges 232 limit the discontinuity of magnetic flux between two successive branches and thus limit the eddy currents in the event of high speed rotation of the rotor part.
  • Four identical coils 24, respectively wound around a core 240, are arranged in pairs on the X-X axis and on the Y-Y axis, between the branches 210 of the main pole piece 21 and the middle pole piece 23.
  • coils 25, respectively wound around a core 250 are arranged in pairs on the centering axes, namely the X-X axis and on the Y-Y axis, between the branches 220 of the main pole piece 22 and the middle pole piece 23.
  • the coils 25 are identical to the coils 24.
  • the coils 24 and 25 are independent.
  • Static, non-magnetic shims, 241 and 251 are arranged between each of the cores and one of the pole pieces 21, 22 or 23.
  • Two permanent, cylindrical and identical magnets 26 and 27 are arranged on either side of the middle pole piece 23 while being centered on the Z-Z axis.
  • the permanent magnet 26 is inserted between the pole piece 21 and the piece middle pole 23, and the permanent magnet 27 is inserted between the pieces polar 22 and 23.
  • Magnets 26 and 27 have magnetizations parallel to the axis of rotation Z-Z, and of opposite directions, for example both directed towards the middle pole piece 23.
  • the inside diameter of the pole piece 23 is less than that of the magnets 26 and 27, so that the inner end of the middle pole piece 23 forms a flange 233, opposite the flange 12 of the rotor part 1.
  • the magnetic bearing according to the invention comprises, for each plane containing the axis Z-Z and a radial centering axis, here X-X, three air gaps E1, E2 and E3.
  • the first air gaps E1 and E2 extend between the rotor part 1 and the pole pieces 21 and 22. More specifically, the first air gap E1 extends between the upper face 14 of the rotor part 1 and a portion of the face lower of the upper pole piece 21.
  • the flange 11 increases the surface of the face upper 14, and therefore promotes the passage of magnetic flux through the air gap E1.
  • the second air gap E2 extends between the lower face 15 of the part rotor 1 and a portion of the upper face of the lower pole piece 22.
  • the second air gap is similar to the first air gap E1.
  • the air gaps E1 and E2, called main air gaps, are thick variable parallel to the axis of rotation Z-Z.
  • the third air gap E3 extends between the collar 12 and the collar 233 of the middle pole piece 23.
  • the air gap E3, called the middle air gap, is of variable thickness parallel to the transverse axis considered.
  • the rotor A which can extend on either side of the rotor part along the Z-Z axis, is made of non-magnetic material to avoid propagation of magnetic flux outside ferromagnetic parts previously described.
  • the permanent magnet 26 generates a passing magnetic flux, according to a first magnetic loop 260, in the pole piece 23, the air gap E3, the rotor part 1, the air gap E1 and the pole piece 21, and according to a second magnetic loop 261, in the pole piece 23, the magnetic cores 240, the static wedges 241 and the pole piece 21.
  • the permanent magnet 27 generates a passing magnetic flux, according to a first magnetic loop 270, in the middle pole piece 23, the air gap E3, the rotor part 1, the air gap E3 and the pole piece 22 and according to a second magnetic loop 271 in the pole piece 23, the cores 250, the static wedges 251 and the pole piece 22.
  • the two magnets being identical and with longitudinal magnetization in meaning opposite, the fluxes generated create a position balance of the rotor part 1 compared to stator part 2. This balance is unstable.
  • the two coils 25 aligned along the axis X-X are traversed by electric currents.
  • Each of these currents generates a flow induction 4 passing through the middle pole piece 23, the air gap E2, the part rotor 1, air gap E1, and pole piece 22.
  • the magnetic fluxes 3 and 4 of the coils 24 and 25 located on the left in FIG. 4 are added together, and also with the magnetic fluxes of the magnets 26 and 27.
  • the magnetic fluxes 3 and 4 of the coils 24 and 25 located on the right in Figure 4 add together, but oppose the magnetic fluxes of the magnets 26 and 27.
  • the fluxes induced by the currents in the coils 24 and 25 have opposite influences which neutralize each other, provided that the flows generated are of the same magnitude, that is to say in practice, in assuming that the air gaps E1 and E2 are equal at the instant considered, that the currents flowing in the coils have the same absolute value.
  • the flux induced by the coils 24 and 25 causes a force specific to move the rotor along the X-X transverse axis, more precisely to the left in the example described in figure 4. It is thus possible to center so activates the magnetic bearing along the X-X axis, without changing the position of the rotor along the longitudinal axis Z-Z.
  • a displacement of the rotor to the right in FIG. 4 is carried out in reversing the directions of the currents passing through the coils 24 and 25.
  • a displacement of the rotor along the Y-Y axis is carried out so similar, by running currents in the coils 24 and 25 located on the Y-Y axis.
  • the coils 24 and 25 centered on the X-X axis are traversed by currents causing magnetic fluxes that add up to create magnetic loops 5 in the pole piece 21, the air gap E1, the part rotor 1, air gap E2, pole piece 22, magnetic core 250, piece polar 23 and the magnetic core 240.
  • the fluxes induced by the coils 24 and 25 and crossing the pole piece 23 and the air gap E3 neutralize each other if these fluxes are equal, i.e. in practice if the rotor is correctly centered along the X-X axis at the instant considered, if the currents flowing through coils have the same absolute value.
  • the induced fluxes therefore create a force which tends to reduce the air gap E2 and therefore to move the rotor part 1 downwards in FIG. 5. It is thus possible to actively center the magnetic bearing along the axis longitudinal Z-Z.
  • the centering circuits along the Z-Z axis and along the X-X and Y-Y axes are magnetically decoupled.
  • the bearing magnetic has the longitudinal centering axis and a single transverse axis centering.
  • the bearing is then provided with coils 24, 25 on only one axis transverse, arranged opposite symmetrically with respect to the axis Z-Z.
  • the bearing has more than two axes centering transverse, for example three or four, which allows a more precise transverse centering.
  • Each of the transverse centering axes is associated with coils 24, 25.
  • a second embodiment of a magnetic bearing according to the invention differs from the previous mode in that the rotor part is outside the stator part.
  • the same reference numbers, followed by the letter "a" are assigned to the elements of this magnetic bearing which are analogous to the elements of the first bearing described with reference to FIGS. 1 to 5.
  • the second embodiment of a magnetic bearing according to the invention has a rotor part 1a in the form of a hollow axis cylinder longitudinal rotation Z-Z. On the internal face of the rotor part 1a are formed three flanges 11a, 12a and 13a.
  • the rotor part 1a integral with a body Aa, is surrounded along the axis Z-Z by two pole pieces 21a and 22a of the stator part 2a, integral of a body Ba, so as to form two air gaps E1a and E2a.
  • Rooms polar 21a and 22a are two ferromagnetic plates, identical, parallel and arranged transversely to the Z-Z axis, which have four branches, here interconnected along their radially outer edge.
  • the diameter outside of the plates 21a and 22a is equal to that of the rotor part 1a.
  • the stator part 2a also includes a middle pole piece 23a centered on the axis Z-Z, midway between the pole pieces 21a and 22a.
  • the pole piece 23a has a shape corresponding to that of pole pieces 21a and 22a, and has four branches connected together along their radially edge external. Coils 24a and 25a surrounding magnetic cores 240a and 250a are inserted between the pole pieces 21a, 22a and 23a.
  • Two permanent magnets 26a and 27a are arranged on either side, along the axis Z-Z, of the middle pole piece 23a. Magnets 26a and 27a have opposite longitudinal magnetizations, for example convergent. The magnets 26a and 27a are cylindrical and centered on the Z-Z axis.
  • the middle pole piece 23a defines an air gap E3a with the flange 12a of the rotor part 1a.
  • a third embodiment of a magnetic bearing according to the invention is a magnetic bearing with linear movement in the direction YY.
  • This bearing comprises a movable bar 1b along the axis Y-Y and a fixed part 2b.
  • the bar 1b is made of a ferromagnetic material and constitutes a pole piece provided with three flanges 11b, 12b and 13b.
  • the fixed part 2b has two parts symmetrical with respect to the plane containing the axes Y-Y and Z-Z. Each of these parts has plates identical ferromagnets 21b and 22b which are pole pieces, called main, perpendicular to the Z-Z axis.
  • the pole pieces 21b are aligned in a direction parallel to the Y-Y axis, and have notches 211b perpendicular to the Y-Y axis which separate each pole piece 21b into portions aligned along the Y-Y axis and linked in pairs by bridges 212b.
  • the bridges 212b limit eddy currents when traveling at high speed of the moving part. As a variant, the portions of pole pieces are completely separate.
  • pole pieces 22b are aligned in a direction parallel to the Y-Y axis, and have notches 221b perpendicular to the axis Y-Y which separate each pole piece 22b into portions aligned along the Y-Y axis.
  • the notches 221b are similar to those of the pole pieces 21b.
  • a middle pole piece 23b in the form of a bar ferromagnetic, is arranged midway between the plates 21b and 22b.
  • Identical coils 24b and 25b, respectively wound around magnetic cores 240b and 250b are arranged between the pole pieces 21b and 22b, and the middle pole piece 23b.
  • Permanent magnets 26b and 27b in the form of bars, are disposed between the pole pieces 21b and 22b, and the middle pole piece 23b. Magnets 26b and 27b have magnetizations parallel to the reference axis Z-Z and in opposite directions, for example divergent.
  • the magnetic bearing has three air gaps E1 b, E2b and E3b.
  • this magnetic bearing is similar to that of the first embodiment and allows active centering along the axes X-X and Z-Z.
  • stator and rotor parts can be exchanged.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP97402825A 1996-11-25 1997-11-25 Palier magnétique actif longitudinalement et transversalement Withdrawn EP0844410A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9614368A FR2756335B1 (fr) 1996-11-25 1996-11-25 Palier magnetique actif longitudinalement et transversalement
FR9614368 1996-11-25

Publications (1)

Publication Number Publication Date
EP0844410A1 true EP0844410A1 (fr) 1998-05-27

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EP97402825A Withdrawn EP0844410A1 (fr) 1996-11-25 1997-11-25 Palier magnétique actif longitudinalement et transversalement

Country Status (3)

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EP (1) EP0844410A1 (ja)
JP (1) JPH10159849A (ja)
FR (1) FR2756335B1 (ja)

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DE19924852A1 (de) * 1999-05-31 2000-12-07 Abb Alstom Power Ch Ag Lagerung von Rotoren von Generatoren im Magnetfeld
WO2003087602A1 (de) * 2002-04-12 2003-10-23 Forschungszentrum Jülich GmbH Magnetführungseinrichtung
DE102005030724A1 (de) * 2005-07-01 2007-01-04 Levitec Gbmh Elektrisches Magnetlagersystem
FR2923877A1 (fr) * 2007-11-16 2009-05-22 Thales Sa Palier magnetique centreur a double etages
EP2945173A3 (en) * 2014-05-16 2015-12-09 General Electric Company Symmetrical electromagnetic actuator
CN105840655A (zh) * 2016-06-08 2016-08-10 淮阴工学院 一种新型永磁偏置单自由度轴向磁轴承
CN105840654A (zh) * 2016-06-08 2016-08-10 淮阴工学院 一种永磁偏置单自由度轴向磁轴承
CN105864292A (zh) * 2016-06-08 2016-08-17 淮阴工学院 一种永磁偏置三自由度磁轴承
CN105864293A (zh) * 2016-06-08 2016-08-17 淮阴工学院 一种集成化的五自由度磁悬浮电主轴
CN106015331A (zh) * 2016-06-08 2016-10-12 淮阴工学院 一种低功耗永磁偏置五自由度集成化磁轴承
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CN112372261A (zh) * 2020-11-03 2021-02-19 重庆江增船舶重工有限公司 一种调节磁浮轴承、辅助轴承与转子装配间隙的方法
WO2021135276A1 (zh) * 2019-12-31 2021-07-08 珠海格力电器股份有限公司 磁悬浮轴承、压缩机、空调器
CN117424413A (zh) * 2023-09-19 2024-01-19 淮阴工学院 一种带轴向永磁辅助励磁的五自由度磁悬浮电机

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CN106059256B (zh) * 2016-06-08 2018-05-29 淮阴工学院 一种一体化结构的五自由度磁悬浮电机
DE102021110415A1 (de) * 2021-04-23 2022-10-27 Physik Instrumente (PI) GmbH & Co KG Magnetische Lagereinrichtung

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JPS57173615A (en) * 1981-04-20 1982-10-26 Mitsubishi Electric Corp Magnetic bearing
JPS60256620A (ja) * 1984-06-01 1985-12-18 Natl Aerospace Lab 剛性可変機構を有する磁気軸受
JPS61160626A (ja) * 1985-01-07 1986-07-21 Ntn Toyo Bearing Co Ltd 制御式アキシヤル磁気軸受装置
WO1995034763A1 (en) * 1994-06-10 1995-12-21 United Technologies Corporation Dc-biased axial magnetic bearing
EP0713022A1 (fr) * 1994-11-21 1996-05-22 AEROSPATIALE Société Nationale Industrielle Palier magnétique à noyau de bobine rapporté
FR2730021A1 (fr) * 1995-01-27 1996-08-02 Aerospatiale Palier magnetique de basculement, voire de centrage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57173615A (en) * 1981-04-20 1982-10-26 Mitsubishi Electric Corp Magnetic bearing
JPS60256620A (ja) * 1984-06-01 1985-12-18 Natl Aerospace Lab 剛性可変機構を有する磁気軸受
JPS61160626A (ja) * 1985-01-07 1986-07-21 Ntn Toyo Bearing Co Ltd 制御式アキシヤル磁気軸受装置
WO1995034763A1 (en) * 1994-06-10 1995-12-21 United Technologies Corporation Dc-biased axial magnetic bearing
EP0713022A1 (fr) * 1994-11-21 1996-05-22 AEROSPATIALE Société Nationale Industrielle Palier magnétique à noyau de bobine rapporté
FR2730021A1 (fr) * 1995-01-27 1996-08-02 Aerospatiale Palier magnetique de basculement, voire de centrage

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PATENT ABSTRACTS OF JAPAN vol. 010, no. 130 (M - 478) 14 May 1986 (1986-05-14) *
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Cited By (20)

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JPH10159849A (ja) 1998-06-16
FR2756335B1 (fr) 1999-02-12

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